A 30,000kg train moves at 45m/s How how much kinetic energy with the train have?

A. 30,375,000J

B. 30,375J

C. 60,750,000J

D. 675,000J

Does an electric force exist between the dipoles; that is, can two objects with zero net charge exert electric forces on each other?

Thinking about the winter we missed out on this year. Calvin and his tiger go sledding down a snowy hill. There is friction between the snow and the sled, and there is air resistance.

How does the temperature of water affect the speed of the sound waves?

Two plastic balls suspended by strings are placed close to each other. If they have the same charge, how will they interact with each other? a) they will repel each other. b) they will attract each other. c) they will not interact.

Sound waves in air travel at approximately 330m/s. Calculate the frequency of a 2.5m-long sound wave.

Think of the last five things you read. Now think of a type of reading you havent done recenty have never read. What kind of pattern do you see in your reading? What is your favorite type of reading and your least favorite type of reading?

Consider this statement: Air is matter. Which facts best support the statement? A. Balloons can be filled with air. B. Air is essential for life to exist. C. Air has mass. D. Air is not an element. E. To float on air is to be happy. F.

Hydroelectric power uses: wind water coal the sun

Two lightweight metal spheres are suspended near each other from insulating threads. One sphere has a net charge; the other sphere has no net charge. The spheres will: A. Attract each other B. Exert no electrostatic force on each other C.

Read the given list of organisms. squirrel, zebra, tortoise, rabbit, horse What best describes the role of these five organisms in a food web?